and you asked john brennan that today. he responded that any american who is a member of al qaeda should know that we are with al qaeda and anybody who's in al qaeda can surrender at any time and thereby eliminate their risk of being killed by the united states. were you satisfied with that answer? >> i wasn't. and here's what's at stake. there are certainly instances where an american takes up arms against the united states, where i think it's important in order to protect the country to use lethal force. but i can tell you the government makes mistakes and sometimes the intelligence is flawed and sometimes they get the wrong person. and the reason i asked that question is i think those kinds of issues ought to be part of this debate and ought to be part of a system of checks and balances. >> oregon democratic senator ron wyden, i know it's been a very, very long and tax day four. thank you for your time tonight, sir. >> thank you for having me. >> thanks. >>> it took longer than scheduled for this riveting hearing on cap